• At the time of his inauguration, all of the former presidents, with the exception of George Washington, were alive.• He served in the House of Representatives for 17 years and remains the only president to hold office in the House after his presidential term expired.• He is the first of two presidents whose father was also president; George W. Bush is the second.• During his House tenure, he was an opponent of slavery. By the time he died, he was known as a champion of freedom of speech.